I've been tying my shoelaces like this for the last six years. It is definitely worth the investment, if only because you spend less boring time tying your shoelaces.
Surprisingly interesting. You look at it and think, oh, of course it was a square knot, how come I didn't think of that? These things are so common and motorized that nobody cares to think of another way to do it.
I've been using Ian's Secure Knot from the same site for a few years now, after my slippery-shoelace problem reached such crisis proportions that I preferred to spend an hour Googling for, and learning, a better knot, than having to keep retying my shoelaces.
The new knot has never once accidentally come undone, and is about as quick to tie and untie as the Standard Knot -- maybe even a little faster.
